Temperature Reduction Effects of Rooftop Garden Arrangements: A Case Study of Seoul National University

Kim, Jaekyoung; Lee, Sang Yeob; Kang, Junsuk

doi:10.3390/su12156032

Cited by 27 publications

(8 citation statements)

References 34 publications

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“…This result is in-line with studies by Ng et al and Jamei et al [11,18], which reported a very low temperature reduction due to the implementation of green roofs. On the contrary, there are other studies which reported a moderate-to-significant temperature reduction caused by the application of green roofs [68][69][70]. In this study, the maximum temperature reduction at 15:00 was recorded as 0.47 • C in Scenario C. This number, however, is quite small considering that all buildings in the area were covered with green roof.…”

Section: Air Temperature and Relative Humiditycontrasting

confidence: 71%

Studying the Effect of Blue-Green Infrastructure on Microclimate and Human Thermal Comfort in Melbourne’s Central Business District

et al. 2022

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Blue-green infrastructure (BGI) is defined as a strategically planned network of natural and semi-natural areas with other environmental features designed and managed to deliver a wide range of ecosystem services, which include microclimate regulation and enhanced human thermal comfort. While green infrastructure is widely known to be capable of mitigating the adverse effects of urban heat island, the effect of blue infrastructure to regulate thermal comfort is still poorly understood. This study investigates several blue-green-infrastructure (BGI) scenarios in the central business district (CBD) of Melbourne, Australia to assess their effects on microclimate and human thermal comfort. Three-dimensional microclimatic modelling software, ENVI-met, was used to simulate the microclimate and human thermal comfort. Physiological equivalent temperature (PET) was used to quantify the level of thermal comfort in selected research areas. Ten different scenarios were simulated, which included those based on green roofs, green walls, trees, ponds and fountains. The simulations suggest that green roofs and green walls in the high-rise building environment have a small temperature reduction in its surrounding area by up to 0.47 °C and 0.27 °C, respectively, and there is no noticeable improvement in the level of thermal perception. The tree-based scenarios decrease temperature by up to 0.93 °C and improve the thermal perception from hot to warm. Scenarios based on water bodies and fountains decrease the temperature by up to 0.51 °C and 1.48 °C, respectively, yet they cannot improve the thermal perception of the area. A deeper water body has a better microclimate improvement as compared to a shallow one. The temperature reduction in the fountain scenario tends to be local and the effect could only be felt within a certain radius from the fountain.

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Section: Air Temperature and Relative Humiditycontrasting

confidence: 71%

Studying the Effect of Blue-Green Infrastructure on Microclimate and Human Thermal Comfort in Melbourne’s Central Business District

et al. 2022

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“…In addition, air temperature was also found to decrease by 1.76-1.79 • C due to the application of green roofs [53] and the reduction was higher by 1.90 • C if the green roof was combined with trees and green walls. Another study by Kim showed that the temperature reduction was only by 0.3 • C with the installation of an intensive green roof [87]. Tsoka et al [66] concluded that the maximum air temperature reduction in a green roof was between 0.1 • C and 1.7 • C, with the median value of reduction being close to 0.3 • C.…”

Section: Green Roofsmentioning

confidence: 99%

Green Infrastructure as an Urban Heat Island Mitigation Strategy—A Review

Balany

Muttil

et al. 2020

Water

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Research on urban heat mitigation has been growing in recent years with many of the studies focusing on green infrastructure (GI) as a strategy to mitigate the adverse effects of an urban heat island (UHI). This paper aims at presenting a review of the range of findings from GI research for urban heat mitigation through a review of scientific articles published during the years 2009–2020. This research includes a review of the different types of GI and its contribution for urban heat mitigation and human thermal comfort. In addition to analysing different mitigation strategies, numerical simulation tools that are commonly used are also reviewed. It is seen that ENVI-met is one of the modelling tools that is considered as a reliable to simulate different mitigation strategies and hence has been widely used in the recent past. Considering its popularity in urban microclimate studies, this article also provides a review of ENVI-met simulation results that were reported in the reviewed papers. It was observed that the majority of the research was conducted on a limited spatial scale and focused on temperature and human thermal comfort.

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“…(Jaekyoung Kim, 2020) The study conducted on Seoul National University's campus via an ENVI-Met analysis simulation concluded that a temperature reduction of was 0.3•C was observed for a fully afforested (extensive roof) while a temperature difference of 0.2•C was observed for intensive roof gardens.…”

Section: Green Roofs Can Effectively Reduce Indoor Air Temperatures Of the Buildings They Are Planted Onmentioning

confidence: 99%

Mitigation of Urban Heat Island Effect Through Design

Patil¹,

Sood²

2021

Proceedings of DARCH 2021- 1st International Conference on Architecture &Amp; Design

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Today almost fifty five percent of the world's population lives in cities. It is estimated that by 2050, the population would grow by 2.5 billion with about sixty eight percent of the world's population would be living in cities. Along with this population projection, it has also been estimated that the phenomenon of climate change will increase abundantly in this century and will lead to climate related extreme events. To combat such events in urban areas, their causes and consequences should be understood; to mitigate them and minimize the negative impacts of urbanization.

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Temperature Reduction Effects of Rooftop Garden Arrangements: A Case Study of Seoul National University

Cited by 27 publications

References 34 publications

Studying the Effect of Blue-Green Infrastructure on Microclimate and Human Thermal Comfort in Melbourne’s Central Business District

Studying the Effect of Blue-Green Infrastructure on Microclimate and Human Thermal Comfort in Melbourne’s Central Business District

Green Infrastructure as an Urban Heat Island Mitigation Strategy—A Review

Mitigation of Urban Heat Island Effect Through Design

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